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Explain How Cells Use Active Transport

Worksheet Overview

QUESTION 1 of 10

Active transport is the movement of substances from an area of low concentration to a higher concentration either into or out of cells.

Image of carrier proteins and active transport

During active transport, carriers in the cell membrane ‘pick up’ particles and move them against the concentration gradient.

As the name suggests, active transport requires energy from the cell, which is made available by respiration.

Image showing active transport

In the picture above, there are three particles outside of the cell and five particles inside the cell. The three particles will be carried through to the inside of the cell by the carrier protein using energy to do so.

Uses of Active Transport

 Image of villi in intestine

During digestion, the villi in the small intestine absorb the nutrients from our digested food. Over time, the concentration of nutrients in the villi is equal with the concentration in the gut. The cells need these nutrients so active transport is used to continue the transport of the small amounts of remaining nutrients. 

Image of root hair cell

Plants need to absorb minerals such as nitrogen, phosphorus and potassium from the soil for healthy growth. When the concentration of minerals in the soil is lower than inside the plant, active transport is used to absorb the minerals against the concentration gradient. If plants used diffusion instead of active transport, the plants would be drained of all their minerals because they would travel down the concentration gradient, the plant would lose all its nutrients to the soil.

In the following activity, you will explain how cells use the process of active transport. 

Plant and animal cells use active transport to transport important nutrients into their cells. Describe active transport. 

Fill in the blanks below to answer this question.

 

Glucose molecules can be absorbed from the intestines into the blood by active transport. Why is active transport needed? Select two answers below.

The concentration of glucose is higher in the intestines than in the blood

The concentration of glucose is lower in the intestines than in the blood

Active transport is needed to move the glucose molecules down the concentration gradient

Active transport is needed to move the glucose molecules against the concentration gradient

Plants need important nutrients such as nitrates in order to grow. Match up the sentences describing how active transport helps plants get the nutrients they need.

Column A

Column B

The concentration of minerals in the soil is very ...
...surface area and thin walls.
Root hair cells are adapted to absorb the water ou...
...them into the cell against the concentration gr...
Minerals such as nitrate ions cannot be absorbed b...
...diffusion (because the minerals are in very low...
The root hair cells have carrier molecules on thei...
...in water and move around the soil in solution.

 

Image of nitrates taken up by active transport

The diagram above shows molecules of nitrates in the soil. There are two molecules of nitrates in the soil and four molecules of nitrates in the root hair cell of a plant. The nitrates will move into the root hair cell from the soil. What makes this possible?  Select two answers below.

Carrier protein

Nucleus

Root hair cell

Energy

What are some of the differences between osmosis and active transport? Select one answer in each row.

Image of carrier proteins and active transport     Image of particles moving via osmosis

Osmosis and active transport are two processes used by cells in plants and animals. Name a similarity between the process of osmosis and active transport. Select one answer below.

Image of carrier proteins and active transport     Image of particles moving via osmosis

Moves down concentration gradient

Energy needed

Transports substances into or out of cells

Carrier protein needed

Image of glucose into cell via active transport

The image above shows glucose moving against a concentration gradient during digestion. How does the cell transport the glucose across the cell membrane? Select two answers below.

Energy is needed to transport substances through a carrier protein

Substances can move by diffusion

The carrier protein is not needed to transport substances

The carrier protein is selective and only specific substances can pass through like glucose

 

Image of nitrates taken up by active transport

The diagram above shows molecules of nitrates in the soil. There are two molecules of nitrates in the soil and four molecules of nitrates in the root hair cell of a plant. Why is it important that the nitrates move by active transport and not diffusion? Select one answer below.

Diffusion would take longer to transport the nitrates

Diffusion would mean the plant would lose nitrates to the soil

Diffusion is passive

Image of carrier proteins transporting glucose

Glucose is transported into cells for respiration. The above picture shows three molecules of glucose outside the cell and five molecules of glucose inside the cell. Select which arrow fits best in box a and box b above.

(a) →

(b) ←

(a) ↓

(b) ↓

George and Paul are taking care of their house plants. George added some fertiliser to one of the plants. The fertiliser contains nitrogen in the form of nitrates. George and Paul both think that the plant's root hair cells absorb the nitrates however George thinks this process is by osmosis whereas Paul thinks that the nitrates are absorbed through active transport. Who is correct? Select one answer below.

George

Paul

Both Paul and George

  • Question 1

Plant and animal cells use active transport to transport important nutrients into their cells. Describe active transport. 

Fill in the blanks below to answer this question.

 

CORRECT ANSWER
EDDIE SAYS
Active transport is really important for cells, they\'re able to get the substances they need for different processes like digestion. Active transport ensures that substances are absorbed regardless of concentration.
  • Question 2

Glucose molecules can be absorbed from the intestines into the blood by active transport. Why is active transport needed? Select two answers below.

CORRECT ANSWER
The concentration of glucose is lower in the intestines than in the blood
Active transport is needed to move the glucose molecules against the concentration gradient
EDDIE SAYS
Even if there isn't much glucose in the intestines, the glucose will still be transported against the concentration gradient into the blood through active transport. This is because our cells need important substances like glucose for respiration.
  • Question 3

Plants need important nutrients such as nitrates in order to grow. Match up the sentences describing how active transport helps plants get the nutrients they need.

CORRECT ANSWER

Column A

Column B

The concentration of minerals in ...
...in water and move around the s...
Root hair cells are adapted to ab...
...surface area and thin walls.
Minerals such as nitrate ions can...
...diffusion (because the mineral...
The root hair cells have carrier ...
...them into the cell against the...
EDDIE SAYS
With osmosis and diffusion particles moves from a higher concentration to a lower concentration. With active transport, it is the opposite- from a lower concentration to a higher concentration.
  • Question 4

 

Image of nitrates taken up by active transport

The diagram above shows molecules of nitrates in the soil. There are two molecules of nitrates in the soil and four molecules of nitrates in the root hair cell of a plant. The nitrates will move into the root hair cell from the soil. What makes this possible?  Select two answers below.

CORRECT ANSWER
Carrier protein
Energy
EDDIE SAYS
Remember active transport is only possible if there is energy to power the process. A carrier protein is needed for the particles to pass through the cells membrane.
  • Question 5

What are some of the differences between osmosis and active transport? Select one answer in each row.

Image of carrier proteins and active transport     Image of particles moving via osmosis

CORRECT ANSWER
EDDIE SAYS
Osmosis and active transport are almost opposite processes in that one is passive (osmosis) and the other needs energy (active transport). Remembering one process will hopefully help you to remember the other for your exams!
  • Question 6

Osmosis and active transport are two processes used by cells in plants and animals. Name a similarity between the process of osmosis and active transport. Select one answer below.

Image of carrier proteins and active transport     Image of particles moving via osmosis

CORRECT ANSWER
Transports substances into or out of cells
EDDIE SAYS
Osmosis and active transport are similar in that they are used to transport different substances into or out of cells. How they transport these substances is where they differ.
  • Question 7

Image of glucose into cell via active transport

The image above shows glucose moving against a concentration gradient during digestion. How does the cell transport the glucose across the cell membrane? Select two answers below.

CORRECT ANSWER
Energy is needed to transport substances through a carrier protein
The carrier protein is selective and only specific substances can pass through like glucose
EDDIE SAYS
Active transport allows substances to move, using energy, from a low to high concentration. Without energy this process wouldn't be able to happen.
  • Question 8

 

Image of nitrates taken up by active transport

The diagram above shows molecules of nitrates in the soil. There are two molecules of nitrates in the soil and four molecules of nitrates in the root hair cell of a plant. Why is it important that the nitrates move by active transport and not diffusion? Select one answer below.

CORRECT ANSWER
Diffusion would mean the plant would lose nitrates to the soil
EDDIE SAYS
Remember active transport is the movement of particles from low to high concentrations. Diffusion is the opposite so particles move from high to low concentrations. If this happened here, the plant would become drained of all nutrients.
  • Question 9

Image of carrier proteins transporting glucose

Glucose is transported into cells for respiration. The above picture shows three molecules of glucose outside the cell and five molecules of glucose inside the cell. Select which arrow fits best in box a and box b above.

CORRECT ANSWER
(a) ↓
(b) ↓
EDDIE SAYS
The glucose travels against a concentration gradient from a lower concentration to a higher concentration via the carrier proteins.
  • Question 10

George and Paul are taking care of their house plants. George added some fertiliser to one of the plants. The fertiliser contains nitrogen in the form of nitrates. George and Paul both think that the plant's root hair cells absorb the nitrates however George thinks this process is by osmosis whereas Paul thinks that the nitrates are absorbed through active transport. Who is correct? Select one answer below.

CORRECT ANSWER
Paul
EDDIE SAYS
Nutrients such as nitrates are absorbed through root hair cells however George isn't correct because osmosis refers to the movement of water molecules and not nitrates.
---- OR ----

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